Friction-gear for locomotives.



C. B.'PATCH.

FRICTION GEAR FDR LOCOMOTIVES.

APPLICATION man NOV. 6. 1915.

' 1,251,094. Patented Dee. 25,1917.

WITNESS.

@[uLn/HPaic/L T A'TTORNE mgiqa-mjw CALVIN B. PATCH, OF GLEINELLYN,ILLINOIS, ASSIGNOR TO WILLIAM H. MINER, OF

- CHAZY, NEW YORK.

Specification of Letters Patent.

FRICTION-GEAR FOR LOCOMOTIVES.

Patented Dec. 25, 1917.

Application filed November 6, 1915. Serial No. 59,910.

a gear of heavy capacity and having a gradnated action, and which ismore particularly adapted for application to the front ends-oflocomotives.

In said drawing, Figure 1 is a horizontal, sectional View of a portionof a locomotive showing my improvement in connection therewith, and Fig.2 is a'longitudinal, vertical sectional view taken substantially on theline 22 of Fig. 1. F I

In said drawing, 10 denotes a casting at the front end of thelocomotive, the same being provided with asubstantially rectangularopening or pocket 11 within which is adapted to be received the improvedgear. As shown, the gear proper consists of a casting A having twofriction cylinders 1212 at the sides thereof, two spring casings 1313,one for each friction cylinder, and a centrally located preliminaryspring chamber 14. As is apparent from the drawing, each combinedfriction cylinder and spring casing 1218 is-closed at the front end by awall 15 and open at the rear end, whereas the spring chamber 14.- isclosed at its rear end by an integral wall 16 and open at its front end.All the foregoing friction shells and spring chambers are castintegrally. Within each friction shell 12 is mounted the frictionmechanism consisting of friction shoes 17 and wedge '18 and within eachspring chamber 13 is a heavy spring 19 which preferably consists of twonested coils. The elements of each friction mechanism are held insuitable assembled relation by means.- of a retaining bolt 20. Withinthe spring chamber 14 is a relatively heavy prelimiiiary spring 21 whichbears at its rear end against the wall 16, and at its front end againsta spring follower 22 which is telescoped Within the spring chamber 14:and is A is held by the key stops 2'6 limited in its inward movement byan annular shoulder 23. The preliminary spring and spring follower 22are held in assembled relation by means of a bolt 2 The wedges 18 of thefriction mechanisms bear against a heavy rear follower 124 which isprevented from rearward movement by the rear wall 25 of the casting 10.Forward movement of the casting A is prevented by the removable keys26which are inserted through suitable openings in the upper and lowerwalls 27 and 28 of the casting 10. The draw bar 29 bears at its innerend against the spring follower 22 and is connected by a key 30 with ayoke 31, which encircles the casting A and the follower 124, the rearend of said yoke being accommodated in a recess 32 at the back of'thepocket 11.

Upon inward or butting movement of the draw-bar 29, the preliminaryspring 21 is first compressed until the follower 22 en gages theshoulder 23. Thereafter, the entire castingA is moved rearwardly thusactuating the twin arranged friction mechanisms. In draft or forwardmovement of the draw-bar 29, the rear follower 124 is pulled by the yokethereby actuating the two sets of friction mechanisms since the casting26. As clearly appears from Fig. 2, rearward movement of the coupler key30 is permitted without moving the yoke 31 by the elongated slots 33 inthe yoke arms.

From the preceding description and drawing, it will be noted that thedraw-bar is movable between the two laterally spaced friction shells andspring casings thereby obtaining a relatively short overall length ofthe gear, in the center line of draft. Also, it is apparent that theaction under buff is graduated and an ultimate high capacity isobtained.

I claim:

1. In mechanism of the character described, the combination with twinarranged, laterally spaced friction mechanisms adapted to have adraw-bar move therebetwecn, of a spring independent of the frictionmechanisms operable by the draw-bar.

- 2. As an article of manufacture, a casting for shock absorbingmechanism, said casting having twin arranged, laterally spaced frictionshells, both open at the same end, and a spring chamber intermediatesaid shells, said spring chamber being open at one end.

preliminary spring upon bniling movement, said irlctlon mechanismsbeing-operated simultaneously on draft and independently of thepreliminary spring.

15.111 mechanism oi the character described the combination Wlth a rearfollower, acasting in. front of said follower, said casting having twinarranged friction shells opening toward the rear and. a spring clnrrnberintermediate said shells opening toward the front, friction elementscooperatinc; with each of said shells and resisted in rearward movementby said rear follower, and main springs associated With each of saidfriction mechanisms, of a preliminary spring within said spring chambera spring follower-in said tireliniinary spring chamber and means forlimiting the inwerd movement of said spring follower under huli, thefriction shells being moved rearwardly through the instrmnentality ofsaid spring follower Miter the preliminary spring has been compressed.

In Witness that I claim the foregoing I.

have hereunto subscribed my name this 18th 30 day of Octobefllillii.

CALVIN B. PATCH.

